docs: def group_records_by_type(records):
      """Break records into two lists; create/update events and delete events."""
      update_records, delete_records = [], []
      for r in records:
          if isinstance(r, str):
              break
  
          if r['detail']['eventName'] in UPDATE_EVENTS:
              update_records.append(r)
          else:
              delete_records.append(r)
      return update_records, delete_records